Why does my iPhone 3GS turn off and on after few minutes

My iphone 3 GS has been turned off for a week. Now when I use it it turns off and on (by itself) every few minutes.

The Basic Troubleshooting Steps are:
Restart... Reset... Restore from Backup...  Restore as New...
Restart / Reset
http://support.apple.com/kb/ht1430
Try this First... You will Not Lose Any Data...
Turn the Phone Off... ( if it isn’t already )
Press and Hold the Sleep/Wake Button and the Home Button at the Same Time...
Wait for the Apple logo to Appear and then Disappear...
Usually takes about 15 - 20 Seconds... ( But can take Longer...)
Release the Buttons...
Turn the Phone On...
If that does not help... See Here:
Backing up, Updating and Restoring
http://support.apple.com/kb/HT1414
If you try all these Steps and you still have issues... Then a Visit to an Apple Store or AASP (Authorized Apple Service Provider) is the Next Step... Be sure to make an appointment first...

Similar Messages

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    Hey, right now my battery is dead on my iphone 3gs. When i plug it in it shows the apple( to show that its turning on) then it turns off. It repeats this constantly until I get frustrated and unplug it. I tried to plug it into itunes, to restore it, on my macbook pro but it doesnt show, and it just reapeats the turning off then on process.
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    The Basic Troubleshooting Steps are:
    Restart... Reset... Restore from Backup...  Restore as New...
    Restart / Reset
    http://support.apple.com/kb/ht1430
    Try this First... You will Not Lose Any Data...
    Turn the Phone Off... ( if it isn’t already )
    Press and Hold the Sleep/Wake Button and the Home Button at the Same Time...
    Wait for the Apple logo to Appear and then Disappear...
    Usually takes about 15 - 20 Seconds... ( But can take Longer...)
    Release the Buttons...
    Turn the Phone On...
    If that does not help... See Here:
    Backing up, Updating and Restoring
    http://support.apple.com/kb/HT1414
    If you try all these Steps and you still have issues... Then a Visit to an Apple Store or AASP (Authorized Apple Service Provider) is the Next Step... Be sure to make an appointment first...

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